Differences in weight are much more sex related (male 476 g female 610 g), than
age related. It isn't that easy to distinguish age categories in this species.
They do hover but not very well.
Philip
-----Original Message-----
From: Canberrabirds
On Behalf Of John Layton via Canberrabirds
Sent: Saturday, 21 January, 2023 2:08 PM
To:
Subject: [Canberrabirds] Brown Falcon's awkward hover
At 11:00 a.m. today, in the Pegasus Riding School car park, Holt I
watched as two Black-faced Cuckoo-shrikes hurtled by and entered a
nearby tree. A moment later a Brown Falcon arrived about three metres
directly above the tree and hovered, as the books tell us, "clumsily,"
for a second before flying away. I've read or heard somewhere that if a
Brown Falcon hovers it's probably a younger, lighter bird because the
higher wing loading on older and likely heavier birds would prevent
hovering. 😕 Any comment?
John Layton
Holt
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